JP2592908Y2 - Joint for branch pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a joint for a branch pipe, particularly
The present invention relates to a joint for a branch pipe that is connected to a pipe body using bolts.

[0002]

2. Description of the Related Art Conventionally, there have been known branch pipe joints of the above-mentioned type, for example, those shown in FIGS. FIG.
The joint 2 for a branch pipe of FIG. 11 includes a pair of flange portions 23 on both sides of a joint body 20 including a pedestal portion 21 that is saddle-mounted on the pipe body 1 and a branch pipe connection port portion 22 provided on the pedestal portion 21. ,
23 project in the opposite direction.

A joint 1 for a branch pipe shown in FIGS.
When connecting to a pair of parallel screw shaft portions 91, 91
Is used. In the joint 2 for a branch pipe in the same figure, each seat surface 24, 24 of the pair of flange portions 23, 23 is parallel to one virtual plane (not shown), and the respective flange portions 23, 2
3, screw shaft insertion holes 25, 25 are formed in a circular shape. When connecting the branch pipe joint 2 to the tube 1, the pedestal portion 21 of the branch pipe joint 2 is saddled on the tube 1, the U bolt 9 is fitted to the tube 1, and the pair of U bolts 9 is connected. The screw shaft portions 91, 91 are passed through the screw shaft portion insertion holes 25, 25 of the flange portions 23, 23, and then the nuts 95 are screwed into the respective screw shaft portions 91, 91 and tightened.

A joint 1 for a branch pipe shown in FIGS.
Is also connected to the same type of U shown in FIG.
Bolts 9 are used. In the joint 2 for branch pipes shown in FIGS. 8 and 9, each of the seating surfaces 24, 24 of the pair of flanges 23, 23 is parallel to one virtual plane (not shown). 23, 2
3, screw shaft portion insertion holes 25, 25 that are recessed inward from the outermost edges of the flange portions 23, 23 are formed in concave shapes. When connecting the branch pipe joint 2 to the pipe body 1, the procedure described with reference to FIG. 7 can be employed, and as shown in FIG. 9, only the one screw shaft portion 91 of the U bolt 9 is provided. The nut 95 is screwed in advance, and one of the screw shaft portions 91 to which the nut 95 is screwed is inserted into the screw shaft portion of the one flange portion 23 of the branch pipe joint 2 in which the pedestal portion 21 is mounted on the tube 1. The U-bolt 9 is moved from the side as shown by an arrow A in the same figure, and the other screw shaft portion 91 is inserted from below into the screw shaft portion insertion hole 25 of the other flange portion 23, as shown by the arrow A in FIG. It is possible to adopt a procedure in which the nut 95 is screwed into the screw shaft portion 91 and tightened.

In the joint 2 for branch pipes shown in FIGS. 10 and 11, the respective seating surfaces 24, 2 of a pair of flanges 23, 23 are provided.
4 are inclined outwardly, and screw shaft portion insertion holes 25, 2 recessed in the respective flange portions 23, 23 inward from the outermost edges of the flange portions 23, 23.
5 is formed in a concave shape. When coupling the branch pipe joint 2 of FIG. 1 to the pipe body 1, a U-bolt 9 having a pair of screw shaft portions 91, 91 extending in the expanding direction is used. When connecting the branch pipe joint 2 to the pipe 1, the pedestal portion 21 of the branch pipe joint 2 is saddled on the pipe 1,
The U-bolt 9 is fitted to the tube 1 and nuts 95,
A pair of screw shaft portions 91, 91 of the U bolt 9 into which the 95 is not screwed are passed through the screw shaft portion insertion holes 25, 25 of the flange portions 23, 23, and then the nut 95 is connected to the respective screw shaft portions 91, 91. And tighten it.

[0006]

[Problems to be Solved by the Invention] FIGS. 6, 7, and 1
In the conventional branch pipe joint 2 described with reference to FIG. 0 and FIG. 11, the pair of screw shaft portions 91 of the U-bolt 9 are first inserted into the two screw shaft portion insertion holes 25 on the branch pipe joint 2 side. From the screw shaft parts 91, 91 to the nut 9
It is necessary to take a procedure of screwing and tightening each of 5,95. In the conventional joint 2 for branch pipes described with reference to FIGS. 8 and 9, a nut 95 can be screwed into one screw shaft portion 91 of the U-bolt 9 in advance, but the other screw shaft portion is used. Regarding 91, it is necessary to adopt a procedure of inserting the nut 95 into the screw shaft portion insertion hole 25 of the other flange portion 23 on the branch pipe joint 2 side, and then screwing and tightening the nut 95.

As described above, in the conventional joint 2 for a branch pipe, it is necessary to take a procedure of inserting the screw shaft portion 91 of the U-bolt 9 into the screw shaft portion insertion hole 25 of the flange portion 23 and then screwing the nut 95 to tighten. there were. For this reason, the worker is forced to carry out the work while holding both the U bolt 9 and the nut 95 by hand, which may take time to construct the branch pipe joint 2, and the nut during the work. 95 may be dropped by mistake. Under such circumstances, it has been demanded that the joint 2 for branch pipes can be constructed using the U-bolt 9 in which the nuts 95, 95 are screwed in advance into both the pair of screw shaft portions 91, 91. Further, if the seat surfaces 24, 24 of the pair of flange portions 23, 23 are inclined outwardly outward as in the joint 2 for a branch pipe described in FIGS. 10 and 11, when the nuts 95, 95 are tightened. The nuts 95, 95 may slide outwardly on the seating surfaces 24, 24 as indicated by arrow X. In severe cases, the nuts 95, 95 may fall off the seating surfaces.

The present invention has been made in view of the above circumstances, and by devising the shape of a screw shaft portion insertion hole formed in a flange portion, a U-shaped screw in which a nut is previously screwed into both of a pair of screw shaft portions is provided. An object of the present invention is to enable a joint for a branch pipe to be constructed using bolts. Further, even if the seating surface of the flange portion is inclined outwardly, a joint for a branch pipe is provided in which the nut does not slip outward or fall off the seating surface in the seating surface shape. With the goal.

[0009]

A joint for a branch pipe according to the invention of the first aspect is a joint for a branch pipe connected to a pipe using a U-bolt having a pair of parallel screw shafts. A pair of flanges are respectively protruded in opposite directions on both sides of the joint main body having the saddle and having the branch pipe connection port, and each seat surface of these flanges is parallel to one virtual plane. In each of the flange portions, a recessed screw shaft portion insertion hole through which the screw shaft portion of the U bolt can be fitted and removed in the axial direction of the tubular body is formed.

A joint for a branch pipe according to the invention of claim 2 is a joint for a branch pipe connected to a pipe using a U-bolt having a pair of threaded shaft parts extending in a spreading direction, the saddle riding on the pipe and A pair of flanges are separately protruded in opposite directions on both sides of the joint main body having the branch pipe connection port, and each seating surface of these flanges is inclined outwardly, and each flange has A recessed screw shaft portion insertion hole through which the screw shaft portion of the U bolt can be fitted and removed in the axial direction of the tube body.

[0011]

The joint for a branch pipe according to the first and second aspects of the present invention has a structure in which a U-bolt is attached to a pipe on which the joint for a branch pipe is straddled even if a nut is screwed in advance to a pair of screw shaft portions of the U-bolt. By moving the U-bolt in the axial direction of the tube after fitting, the pair of screw shaft portions can be fitted into the screw shaft portion insertion holes of the pair of flange portions without being interrupted by the nut. Then, after fitting the pair of screw shaft portions into the screw shaft portion insertion holes of the pair of flange portions, the nut is screwed and tightened, and the joint for branch pipe is attached to the pipe body. According to the invention of claim 2, even if a force is applied to slide the nut outward on the bearing surface of the flange portion when the nut is tightened, the screw shaft insertion hole is in the direction of the force. The nut is not opened so that the nut does not slip off on the seat and fall off.

[0012]

1 to 3 show a procedure for installing a branch pipe joint 2 according to an embodiment of the present invention and a state after the installation. This joint 2 for a branch pipe is described with reference to FIGS.
9 is a type corresponding to FIG.
Each of the seat surfaces 24, 24 of the reference numerals 3, 23 is parallel to one virtual plane (not shown). Then, screw shaft portion insertion holes 25, 25 formed in the respective flange portions 23, 23 are formed.
Is formed in a concave shape in which the pedestal portion 21 of each of the flange portions 23, 23 is recessed from one axial end to the other end of the tubular body 1 on which the saddle rides. Therefore, the pedestal 2
When the tube 1 is mounted on the tube 1, the screw shaft portions 91, 91 of the U-bolt 9 can be moved in the axial direction of the tube 1, and can be fitted into and removed from the screw shaft insertion holes 25, 25. Screw shaft insertion hole 25,
Other configurations except for the shape of 25 are the same as those described with reference to FIGS.

The joint 2 for a branch pipe according to this embodiment can be constructed by using U bolts 9 in which nuts 95, 95 are previously screwed to a pair of parallel screw shaft portions 91, 91. That is, a pair of screw shaft portions 91, 91 of the U bolt 9
And a pair of flange portions 2 of the joint 2 for branch pipes in which the pedestal portion 21 is mounted on the tube 1 in advance.
The U-bolt 9 fitted to the tube 1 is moved in the axial direction of the tube 1 as shown by arrows Y and Y in FIG. 1 and fitted into the screw shaft insertion holes 25 and 25 of the members 3 and 23 from the side. Nut 95,
It is possible to take the procedure of screwing and tightening 95. With this configuration, since the nuts 95 and 95 are screwed to the screw shaft portions 91 and 91 of the U bolt 9 in advance, it is not necessary for the operator to hold the separate nuts 95 and 95 and the U bolt 9 by hand. Therefore, the work becomes easier, and the nuts 95, 95 are not dropped. Also, by loosening the nuts 95 and 95 and moving the U-bolt 9 in the axial direction of the tube 1 in the direction opposite to the arrow Y,
It is also possible to pull out the screw shaft portions 91, 91 from the screw shaft portion insertion holes 25, 25 and remove the branch pipe joint 2 from the tubular body 1.

FIGS. 4 and 5 show a procedure for installing the joint 2 for branch pipes according to an embodiment of the present invention and a state after the installation. The joint 2 for a branch pipe is of a type corresponding to FIGS. 10 and 11 described as a conventional example, and has a pair of flanges 23, 23 protruding in opposite directions on both sides of a joint body 20, respectively. The surfaces 24, 24 are inclined outwardly. Then, each of the flange portions 23, 2
3, the screw shaft portion insertion holes 25, 25 are formed in the respective flange portions 2 in the same manner as the branch pipe joint 2 described with reference to FIGS.
The pedestal portions 21 of the pipes 3 and 23 are formed in concave shapes recessed from one axial end 23a toward the other end 23b of the tubular body 1 on which the saddle rides. Therefore, when the pedestal portion 21 is saddled on the tube 1, the screw shaft portion 9 of the U bolt 9 is
1 and 91 are moved in the axial direction of the tubular body 1 to insert the screw shaft portion through hole 2
5, 25 can be fitted. In the screw shaft insertion holes 25, 25, projecting portions 25a, 25a extend outward.
Is provided. Other configurations except for the shapes of the screw shaft portion insertion holes 25, 25 are the same as those described with reference to FIGS.

The joint 2 for a branch pipe according to this embodiment includes a pair of threaded shaft portions 91, 91 extending in the direction of extension, and a nut 9 in advance.
It is possible to use the U-bolt 9 in which 5,95 are screwed together and to carry out the same procedure as the procedure described in FIG. Therefore, also in this joint 2 for branch pipes, the operator does not need to hold the separate nuts 95 and 95 and the U bolt 9 by hand, and the work becomes simpler and the nut 9
No more dropping 5,95. By loosening the nuts 95 and 95 and moving the U-bolt 9 in the axial direction of the tube 1 in the direction opposite to the arrow Y, the screw shaft portion insertion hole 2
It is also possible to remove the branch pipe joint 2 from the pipe body 1 by pulling out the screw shaft portions 91, 91 from 5, 25.

By the way, as shown in FIG.
When tightened, the seating surfaces 24 of the flange portions 23, 23,
Even if a force as shown by an arrow X acting to slide the nuts 95, 95 outward on the screw 24, the screw shaft portion insertion holes 25,
Since 25 is not opened in the direction of the force, the nut 9
5,95 does not slip off on the seat. Moreover, in this embodiment, since the projecting portions 25a, 25a are provided in the screw shaft portion insertion holes 25, 25, the nut 95,
When 95 slides in the direction of arrow X, screw shaft portions 91 and 9
As a result, the screw shafts 91 do not come out in the axial direction of the tube 1.

As shown in FIGS. 3 and 5, the joint 2 for branch pipes is provided with a cylindrical portion 28 for positioning.
Then, by fitting the cylindrical portion 28 into the opening 12 formed in the pipe wall of the pipe body 1, the joint 2 for branch pipes is prevented from moving in the axial direction of the pipe body 1. This is the same in the conventional example described at the beginning (particularly, see FIG. 11). Therefore, the joint 2 for branch pipes does not move in the axial direction of the pipe 1 and the screw shaft portions 91, 91 of the U-bolt 9 do not come out of the screw shaft insertion holes 25, 25.

[0018]

As described above, according to the joint for a branch pipe of the present invention, a nut is screwed in advance to a pair of screw shafts of a U-bolt, and the pair of screw shafts of the U-bolt is inserted through a pair of flanges. Since the fitting can be performed in the holes, the construction can be simplified accordingly, and at the same time, it is possible to prevent a situation in which an operator drops only the nut by mistake. Further, even if the seat surface of the flange portion is inclined outwardly, there is an effect that when the nut is tightened, the nut does not slip on the seat surface or slip off from the seat surface and fall off.

[Brief description of the drawings]

FIG. 1 is a plan view for explaining a procedure for installing a joint for a branch pipe according to an embodiment of the present invention.

FIG. 2 is a side view showing a state after construction of the branch pipe joint according to the embodiment of the present invention;

FIG. 3 is a front view showing a state after construction of the branch pipe joint according to the embodiment of the present invention;

FIG. 4 is a plan view for explaining a procedure for installing a joint for a branch pipe according to an embodiment of the present invention.

FIG. 5 is a front view showing a state after a branch pipe joint according to an embodiment of the present invention is constructed.

FIG. 6 is a plan view of a conventional branch pipe joint.

FIG. 7 is a front view for explaining a procedure for installing the branch pipe joint of FIG. 6;

FIG. 8 is a plan view of another conventional joint for branch pipes.

FIG. 9 is a partially cutaway front view for explaining the procedure for installing the joint for branch pipes of FIG. 8;

FIG. 10 is a plan view of another conventional joint for branch pipes.

FIG. 11 is a partially cutaway front view for explaining the procedure for installing the branch pipe joint of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe body 2 Branch pipe joint 9 U bolt 20 Joint main body 22 Branch pipe connection port 23 Flange part 24 Seat surface 25 Screw shaft part insertion hole 91, 91 Screw shaft part

Claims (2)

(57) [Scope of request for utility model registration] 1. A joint for a branch pipe connected to a pipe using a U-bolt having a pair of parallel threaded shafts, wherein both sides of a joint body saddle-mounted on the pipe and having a branch pipe connection port. A pair of flange portions are separately protruded in the opposite direction, and each seat surface of these flange portions is parallel to one virtual plane, and the screw shaft portion of the U bolt is mounted on each flange portion. A joint for a branch pipe, wherein a recessed screw shaft portion insertion hole which can be fitted and removed in the axial direction of the pipe body is formed. 2. A joint for a branch pipe connected to a pipe using a U-bolt having a pair of screw shafts extending in a direction of expansion, the joint body being saddle-mounted on the pipe and having a branch pipe connection port. A pair of flange portions are separately protruded in opposite directions on both sides of each of the flange portions, and each seating surface of these flange portions is inclined outwardly, and the screw shaft portion of the U bolt is attached to each flange portion. A joint for a branch pipe, wherein a recessed screw shaft part insertion hole which can be fitted and removed in the axial direction of the pipe body is formed.